<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>

      <!-- 步骤条区域 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- form表单 -->
      <el-form
        label-position="top"
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
      >
        <!-- tabs标签页组件 -->
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="handleTabClick"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="{
                  expandTrigger: 'hover',
                  label: 'cat_name',
                  value: 'cat_id',
                  children: 'children',
                }"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框组件 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- upload组件 -->
            <!-- action是上传图片时后台的API地址 -->
            <el-upload
              :headers="headersObj"
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button
              type="primary"
              style="margin-top: 15px"
              @click="submitAddForm"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览的对话框 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewDialogVisible"
      width="50%"
    >
      <img :src="previewPath" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
import { getCateListApi } from '@/api/cate.js'
import { addGoodApi } from '@/api/list.js'
import { getParamsApi } from '@/api/params.js'
import _ from 'lodash'
export default {
  data () {
    return {
      // steps和tabs的激活项
      activeIndex: '0',
      // 添加商品表单数据
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [], // 商品所属的分类数组
        pics: [], // 图片的数组
        goods_introduce: '', // 商品的详情描述
        attrs: []
      },
      // 添加商品表单校验规则
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请选择商品分类', trigger: 'blur' }]
      },
      // 所有商品分类数据
      cateList: [],
      // 动态参数列表
      manyTableData: [],
      // 静态属性参数列表
      onlyTableData: [],
      // 图片上传地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // upload组件的headers请求头
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览图片的完整路径
      previewPath: '',
      // 控制预览图片对话框的显示与隐藏
      previewDialogVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList () {
      const { data } = await getCateListApi({ type: 3 })
      // console.log(data)
      if (data.meta.status !== 200) return this.$message.error('获取所有商品分类数据失败')
      this.cateList = data.data
    },
    // 级联选择器变化触发的函数
    handleChange () {
      // console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // tabs切换标签页的钩子函数
    beforeTabLeave (activeName, oldActiveName) {
      // console.log('即将进入的标签页名称', activeName)
      // console.log('即将离开的标签页名称', oldActiveName)
      // return false
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    // 监听标签页的点击事件
    async handleTabClick () {
      // console.log(this.activeIndex)
      // 说明在商品参数面板
      if (this.activeIndex === '1') {
        const { data } = await getParamsApi(this.cateId, 'many')
        console.log(data)
        if (data.meta.status !== 200) return this.$message.error('获取商品参数失败')
        data.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = data.data
        // console.log(this.manyTableData)
      } else if (this.activeIndex === '2') {
        const { data } = await getParamsApi(this.cateId, 'only')
        // console.log(data)
        this.onlyTableData = data.data
      }
    },
    // 处理图片预览效果的事件
    handlePreview (file) {
      // console.log(file)
      this.previewPath = file.response.data.url
      this.previewDialogVisible = true
    },
    // 移除图片事件
    handleRemove (file) {
      console.log(file)
      // 1.获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2.从pics数组中通过临时路径找到对应的索引值
      const index = this.addForm.pics.findIndex(item => item.pic === filePath)
      // 3.通过索引值调用splice,从pics数组删除
      this.addForm.pics.splice(index, 1)
    },
    // 监听图片上传成功
    handleSuccess (response) {
      // console.log(response)
      // 1.拼接得到一个图片信息对象(由后端设计数据结构)
      const picInfo = { pic: response.data.tmp_path }
      // 2.将图片临时地址push到pics数组中
      this.addForm.pics.push(picInfo)
    },
    // 添加商品
    async submitAddForm () {
      try {
        await this.$refs.addFormRef.validate()
        // this.addForm.goods_cat = this.addForm.goods_cat.join(',')
        // const { data } = await addGoodApi(this.addForm)
        // lodash  cloneDeep(obj)
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const Info = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(Info)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const Info = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(Info)
        })
        form.attrs = this.addForm.attrs
        const { data } = await addGoodApi(form)
        console.log(data)
        // console.log(form)
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      } catch (error) {
        console.log(error)
        this.$message.error('添加商品失败')
      }
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 25px 0 0 !important;
}
.previewImg {
  width: 100%;
}
</style>
